Here's a Face-Weighted Vertex Normals Tool by Fansub. I'm not quite sure if the tool is still being updated for the latest version of Maya though. There's also CREASE+ which I think was already abandoned. Moreover, there are several live boolean scripts you can find. Haven't tried any of them yet.
Any Kuadro: http://kruelgames.com/tools/kuadro/ Boarder-less floating reference images. 3dsmax Turbo Chamfer: https://polycount.com/discussion/198219/maxscript-turbo-chamfer Saves a ton of time, setting chamfers from smoothing groups it goes great with...…
A ton of Maya stuff here, also Maya Hard Surface but TBH really wasn't difficult to find, just a simple 2min google search... And recommended by @perna for 3ds Max.
Do you mean to speed up the workflow ? Plugins: Ninja Dojo ( works in both Maya and Maya LT ): http://www.bk3d.com/Ninja_Dojo/ Hard Mesh ( only works in Maya full version, it's basically Mesh Fusion ): http://http//www.hard-mesh.com/ PlugIt ( works in Maya full version ): http://https//gumroad.com/l/PlugIt I only use Ninja…